An interpreter and guide in the Near East; in the Ottoman Empire in the 18th and 19th centuries a translator of European languages for the Turkish and Arab authorities and most dragomans were Greek (many reached high positions in the government) WordNet 3.0 & Open English WordNet

A dragoman was an interpreter, translator, and official guide between Turkish-, Arabic-, and Persian-speaking countries and polities of the Middle East and European embassies, consulates, vice-consulates and trading posts. Wikipedia

The official title of a person who would function as an interpreter, translator and official guide between Turkish, Arabic, and Persian-speaking countries and polities of the Middle East and European embassies, consulates, vice-consulates and trading posts. OmegaWiki

An interpreter, especially for the Arabic and Turkish languages. Wiktionary